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2 years ago

whats 2 times 5 plus 8 times six divided by 80.63 times zero. please help fast, totally not to give free points and brainliest

Mathematics

2 answers:

Alecsey [184]2 years ago

7 0

Answer:

the answer is 1.33

Step-by-step explanation:

Deffense [45]2 years ago

5 0

The answer to your questions is 1.33

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Find the value of the expression

sashaice [31]

Answer:

Step-by-step explanation:

t=1

u=2

t+8+u+8+1=1+8+2+8+1=20

8 0

1 year ago

If 48 feet are represented by 12 inches on a scale drawing, then a scale of 1/4 inch represents how many feet? a. 3 foot c. 2 fo

alukav5142 [94]

Hello there!

Math is hard! So we as students, we need to play the smart game with Math in order to find the easiest way to solve the problems. What do I mean? Well as you can see they gave us Fraction which won't be easy! So we will transform the fractions into decimals. So let's get started.

Then a scale of 1/4. Transformed into decimal = Then a scale of 0.25
So instead of using the fraction 1/4, I used its decimal 0.25

So if:

48 feet ......> 12 inches
x feet ........> 0.25 inches

Cross multiply

12 * x = 0.25 * 48

12x = 12
Divide both sides by 12
12x/12 = 12/12

x = 1

The correct answer is option D, 1 foot

I hope this helps! Please let me know if you have any question.

Thanks!

5 0

2 years ago

I’m not sure how to write this equation. Please check the picture to see the graph for yourself! Help will be much appreciated!

Makovka662 [10]

let's notice something, the parabola is a vertical one, so the squared variable is the x, and is opening downwards, meaning the x² will have a negative coefficient.

the distance from the vertex to the directrix/focus is the amount of "p" units, let's see in the graph, the distance from the vertex to the directrix is 2, and since the parabola is opening downwards, "p" is a negative 2, p = -2. The vertex is of course at (0, 2).

$\bf \textit{parabola vertex form with focus point distance}
\\\\
4p(y- k)=(x- h)^2
\qquad
\begin{array}{llll}
vertex\ ( h, k)\\\\ p=\textit{distance from vertex to }\\
\qquad \textit{ focus or directrix}
\end{array}
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
\begin{cases}
h=0\\
k=2\\
p=-2
\end{cases}\implies 4(-2)(y-2)=(x-0)^2\implies -8(y-2)=x^2
\\\\\\
y-2=\cfrac{x^2}{-8}\implies \blacktriangleright y=-\cfrac{1}{8}x^2+2 \blacktriangleleft$

8 0

2 years ago

Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x overbarequals100.

LenaWriter [7]

Answer:

$\hat y = -3.34+ 1.07(91) = 94.03$

Step-by-step explanation:

Data given

n=20 represent the sampel size

$\bar X = 100.39$ represent the sample mean for the independent variable (IQ score of the husband)

$\bar y = 103.6$ represent the sample mean for the dependent variable.

r =0.925 represent the correlation coefficient

Solution to the problem

The general expression for a linear model is given by:

$y = \beta_0 + \beta_1 x$

Where $\beta_0$ is the intercept and $\beta_1$ the slope

For this case we have a linear model given by the following expression:

$\hat y = -3.34 +1.07 x$

Where -3.34 is the intercept and 1.07 the slope. In order to find the best predicted value when X = 91 we just need to replace into the equation the value of 91 and we got this:

$\hat y = -3.34+ 1.07(91) = 94.03$

On this case is the best predicted value because $E(\hat y) = y$ we have an unbiased estimator.

8 0

2 years ago

Find a such that the line x = a divides the region bounded by the graphs of the equations into two regions of equal area. (Round

VladimirAG [237]

Answer:

a≈2.343

Step-by-step explanation:

View Image

Integrating an equation from boundary x₀ to x₁ gives you the area underneath that boundary.

So to find the boundary that split the equation into 2 equal areas, the boundary must lie somewhere between the 2 place to want to split up. In other word, <em>a</em> is the end boundaries of the first integral and the starting boundary of the second integral.

Since the two area must equal to each other, set the two integral equal to each other and solve for a.

6 0

2 years ago